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Learning Embedded Linux Using the Yocto Project
Alexandru Vaduva
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Learning Embedded Linux Using the Yocto Project
Alexandru Vaduva
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Information
Learning Embedded Linux Using the Yocto Project
Table of Contents
Learning Embedded Linux Using the Yocto Project
Credits
About the Author
About the Reviewer
www.PacktPub.com
Support files, eBooks, discount offers, and more
Why subscribe?
Free access for Packt account holders
Preface
What this book covers
What you need for this book
Who this book is for
Conventions
Reader feedback
Customer support
Errata
Piracy
Questions
1. Introduction
Advantages of Linux and open source systems
Embedded systems
General description
Examples
Introducing GNU/Linux
Introduction to the Yocto Project
Buildroot
OpenEmbedded
Summary
2. Cross-compiling
Introducing toolchains
Components of toolchains
Delving into C libraries
Working with toolchains
Advice on robust programming
Generating the toolchain
The Yocto Project reference
Summary
3. Bootloaders
The role of the bootloader
Comparing various bootloaders
Delving into the bootloader cycle
The U-Boot bootloader
Booting the U-Boot options
Porting U-Boot
The Yocto Project
Summary
4. Linux Kernel
The role of the Linux kernel
Delving into the features of the Linux kernel
Memory mapping and management
Page cache and page writeback
The process address space
Process management
Process scheduling
System calls
The virtual file system
Interrupts
Bottom halves
Methods to perform kernel synchronization
Timers
Linux kernel interaction
The development process
Kernel porting
Community interaction
Kernel sources
Configuring kernel
Compiling and installing the kernel
Cross-compiling the Linux kernel
Devices and modules
Debugging a kernel
The Yocto Project reference
Summary
5. The Linux Root Filesystem
Interacting with the root filesystem
Delving into the filesystem
Device drivers
Filesystem options
Understanding BusyBox
Minimal root filesystem
The Yocto Project
Summary
6. Components of the Yocto Project
Poky
Eclipse ADT plug-ins
Hob and Toaster
Autobuilder
Lava
Wic
Summary
7. ADT Eclipse Plug-ins
The Application Development Toolkit
Setting up the environment
Eclipse IDE
QEMU emulator
Debugging
Profiling and tracing
The Yocto Project bitbake commander
Summary
8. Hob, Toaster, and Autobuilder
Hob
Toaster
Autobuilder
Summary
9. Wic and Other Tools
Swabber
Wic
LAVA
Summary
10. Real-time
Understanding GPOS and RTOS
PREEMPT_RT
Applying the PREEMPT_RT patch
The Yocto Project -rt kernel
Disadvantages of the PREEMPT_RT patches
Linux real-time applications
Benchmarking
Meta-realtime
Summary
11. Security
Security in Linux
SELinux
Grsecurity
Security for the Yocto Project
Meta-security and meta-selinux
Meta-security
Meta-selinux
Summary
12. Virtualization
Linux virtualization
SDN and NFV
NFV
ETSI NFV
SDN
OPNFV
Virtualization support for the Yocto Project
Summary
13. CGL and LSB
Linux Standard Base
Carrier grade options
Carrier Grade Linux
Automotive Grade Linux
Carrier Grade Virtualization
Specific support for the Yocto Project
Summary
Index
Learning Embedded Linux Using the Yocto Project
Copyright © 2015 Packt Publishing
All rights reserved. No part of this book may be reproduced, stored in a retrieval system, or transmitted in any form or by any means, without the prior written permission of the publisher, except in the case of brief quotations embedded in critical articles or reviews.
Every effort has been made in the preparation of this book to ensure the accuracy of the information presented. However, the information contained in this book is sold without warranty, either express or implied. Neither the author, nor Packt Publishing, and its dealers and distributors will be held liable for any damages caused or alleged to be caused directly or indirectly by this book.
Packt Publishing has endeavored to provide trademark information about all of the companies and products mentioned in this book by the appropriate use of capitals. However, Packt Publishing cannot guarantee the accuracy of this information.
First published: June 2015
Production reference: 1240615
Published by Packt Publishing Ltd.
Livery Place
35 Livery Street
Birmingham B3 2PB, UK.
ISBN 978-1-78439-739-5
www.packtpub.com
Credits
Author
Alexandru Vaduva
Reviewers
Peter Ducai
Alex Tereschenko
Commissioning Editor
Nadeem N. Bagban
Acquisition Editor
Harsha Bharwani
Content Development Editor
Vaibhav Pawar
Technical Editor
Shivani Kiran Mistry
Copy Editor
Sonia Michelle Cheema
Project Coordinator
Nidhi J. Joshi
Proofreader
Safis Editing
Indexer
Mariammal Chettiyar
Graphics
Sheetal Aute
Disha Haria
Jason Monteiro
Abhinash Sahu
Production Coordinator
Conidon Miranda
Cover Work
Conidon Miranda
About the Author
Alexandru Vaduva is an embedded Linux software engineer whose main focus lies in the field of open source software. He has an inquiring mind and also believes that actions speak louder than words. He is a strong supporter of the idea that there is no need to reinvent the wheel, but there is always room for improvement. He has knowledge of C, Yocto, Linux, Bash, and Python, but he is also open to trying new things and testing new technologies.
Alexandru Vaduva has been a reviewer of the book Embedded Linux Development with Yocto Project, Packt Publishing, which is a great asset to the Yocto Project community.
About the Reviewer
Peter Ducai has 15 years of experience in the IT industry, including the fields of programming and OS administration. Currently, he works at HP as an automation engineer.
Alex Tereschenko is an avid Maker. He believes that computers can do a lot of good when they are interfaced with real-world objects (as opposed to just crunching data in a dusty corner). This drives him in his projects and is also the reason why embedded systems and the Internet of Things are the topics he enjoys the most.
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Preface
With regard to the Linux environment today, most of the topics explained in this book are already available and are covered in a fair bit of detail, This book also covers ...